Improvement in adjusting the packing of pistons in deep wells



NfFETERS. PMDTOEL'THOGRAPHER WASHINGTON D C UNITED STATES PATENT OFFICEeERASMUS D. BROWN, OF BUFFALO, NEW YORK.

IMPROVEMENT IN ADIUSTING THE PACKING OF PISTONS IN DEEP WELLS.

Specification forming part of Letters Patent No. 50,898, dated November14, 1865.

To allrzchom it may concern:

Be it known that I, ERAsMUs D. BROWN, of the city of Buffalo, county ofErie, and State of New York, have invented a certain new and ImprovedHunger-Packing and Mode of EX- panding the Same for Oil-NVell Pumps; andI do hereby declare that the following is a full, clear, and exactdescription ofthe construction and operation thereof', reference beinghad to the accompanying drawings, making a part of this specification,in which- Figure I and I ru is a longitudinal section of plunger andfoot-valve. Fig. II is a cross-section of plunger, on line l 2, Fig. I.Fig. III is a bottom plan of follower by which the packing is expanded.Fig. IV is an elevation of foot-valve, and Fig. V is a top plan of same.

Letters of like naine and kind refer to like parts in each of thefigures.

The nature ofthisinvention consists in so constructing the lower or tailend of the screw-follower and the upper end of foot-valve that bylowering the plunger by the plunger-rod they may be so interlocked that,by turning, the rod and with it the plunger (the follower beingprevented from turning by its interlocking with the foot-valve) will bemade to screw down and expand the packing, and the necessity ofwithdrawing' the plunger from the well to repack avoided. v

A represents the plun ger-head, which is made hollow and furnished witha ball-valve and connected to the pump-rod in a common manner.

B representspacking-rings of gutta-percha or other elastic andcompressible material which surround the head A. Any required number ofthese rings maybe used, they being separated either singly or in pairsby one or more interposed metallic rings or thimbles, O. rlhis metallicring' O placed between the rings otl elastic packing has the effect tocompress and expand the elastic rings from the center outwardly, andhence cause them to pack more closely against the walls of thepump-barrel than would be the case if it was not used. Two or more ofthese metallic thimbles may be used in the same manner, if required.

D represents the screw-follower, which screws onto the lower end of theplunger-head, as

shown at d', and clamps the packing-rings and thimbles between itselfand the shoulder B on the plunger-head. As the packing wears by use, byscrewing up the follower the packing-rings will be compressed andexpanded laterally until they will again tightly ll the bore of thepump-barrel and cause the plunger to work efticaciousl y therein.

E represents the foot-valve, which is of cornmon construction, exceptthat its upper end is bored ont, as shown at c, and has vertical slitsor notches e2 eut therein. The lower or tail end, D', of the follower Dis made to lit the bore e', and has a cross-bar, d2, which lits thenotches e2, so that when placed together the follower is prevented fromturning. By this means the follower may be operated by turning thepump-rod and plunger, and the packing adjusted without the necessity ofremoving the plunger from the well.

When the packing is properly adjusted the plunger may be raised, and itsconnection with the foot-valve broken, and its duty be resumed with agreat saving in the time, labor, and expense now lost in suchadjustment.

For the purpose of withdrawing the footval ve from the pump and well,which frequently requires to be done, the notches e2 are prolongedlaterally, as shown at e3, so that in turning the plunger by the pump-rod the crossbard2 will enter and catch below the shoulder e4, andsecurely connect the foot-valve to the plunger, so that in withdrawingthe plunger by the pump-rod the foot-valve will be taken with it.

Having thus described my invention, what I claim, and desire to secureby Letters Patent, 1s-

So constructing the lower end of the screwfollower D and the upper endof the foot-Valve E as that they may be coupled together and the packingadjusted through the pump-rod, in the manner and for the purposessubstantially as described.

ERASMUS D. BROWN.

Witnesses:

C. ROGERS, W. H. FoREUsi-I.

